docs: def branch(*sinks_):
      """The |branch| decorator creates a |pull| object that pulls from a single
      source and then sends to all the sinks given. After all the sinks received
      the message, it is yielded.
  
      .. |branch| replace:: :py:func:`branch`
      """
      @pull
      def junction(source):
          sinks = [s() for s in sinks_]
  
          for msg in source():
              for s in sinks:
                  s.send(msg)
              yield msg
  
      return junction